Shock-absorber.



W. A. SCHILLER. SHOCK ABSORBER. APPLICATION FILED JUNE 1, 1911.

1,006,686. Patented Oct. 24, 1911.

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' WA Schiller W. A. SCHILLER. SHOCK ABSORBER. APPLICATION FILED JUNE 1, 1911.

Patented Oct. 24, 1911.

2 SHEETS-SHEET 2.

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w part of this application.

WILLIAM A. SCHILLER, OF GOQDISON, MICHIGAN.

I SHOCK-ABSORBER.

Specification of Letters Patent.

Patented. Oct. 24,, 1911.a

Application filed 111118 1', 1911. Serial No. 330,642,

To all whom.- itmay.comcm- Be it known that 1, WILLIAM A. SCHILLER, a citizen of the United States, residing at Goodison, in the county of Oakland, State a of Michigan, have invented certain new and useful Improvements in Shock-Absorbers; and I do hereby declare the following to be a full, clear, and exact description of, the invention, such as will enable others skilled in w the art to which it appertains to make and use the same.

My invention relates to new and useful improvements in shock absorbers and the object of my invention is to provide shock at absorbers for use in connection with vehicles,

which will cooperate with the springs therea A further object of my invention is to rovide ashock absorber which will remain inactive while the springs are being compressed, but which will operate during the expansion of the springs to limit the upward movement of the bod of the vehicle.

With these and other objects/in view my trated in the accompanying drawings which show a preferred embodiment of my shock absorber and then specifically pointed out in the claim which is attached to and forms a In the accompanying drawings, Figure 1 is a side elevation of the absorber-as applied tothe frame of the motor vehicle. Fig. 2 is an end elevation, the frame and springs 36 being shown in section on the line 2--2 of Fig. 1. Fig. 3 is a section on the line 3-3 of Fig. 1. Fig. 4;.is a perspective of the operating cams. Fig. 5 is a section onthe line 5--5 of Fig. 2.

4W Referring more specifically to the drawings in which simllar reference numerals designate correspondin arts throughout, 1

' designates the frame t e vehicle to which is secured the conventional form of spring 2.

My shock absorber, which as a whole is designated by the numeral 3 is adapted to be positioned between the frame and spring, as shown, and to limit the expansion of the spring after its distortion, thus limiting the be upward movement of the vehicle.

The shock absorber 3 consists of ametallic cylinder 4, having a closed end provided with a suitable form of air {intake valve 6 which is normally maintained in closed pov sition by means of a light helical spring 7.

This closed end of the cylinder is also proinvention will be more fully described, illus vided with oneor more ports 8' which permit escape of air from the cylinder. The other end of the cylinder is provided with a closure 9 formed with an extending arm 10, the "free end of which is provided with a lateral extension 11 which is rotatably journaled in suitable bearings 12 carried by the frame. This closure 9 is provided with a centrally located bore 13', in which is. rotatably mounted a lateral extension 14 of a lever arm 15,the other end of which is provided with a second lateral extension 16 which is journaled in suitable bearings 17 carried by the spring, said bearings being preferably located at a point directly below the bearings 12. The inner end of the extension 14 is provided with 'a cam member 18 which is best shown in Fig. of the drawings consists of a diskshaped plate 19' the diameter of which is slightly less than the inner diameter of the cylinder, and

formed integrally withsaid plate and extending from its inner face are the opposit-ely disposed, concentric, wedge cam members 20 and 21, the adjacent ends of which are slightly spaced apart as shown at 22. The inner face of the cylinder 4 is provided with a pair of diametrically oppositely disposed, longitudinal grooves 23 and 24 and reciprocally mounted in the cylinder with its edges seated in these grooves is a plunger plate 25, which as shown in Fig. 5 of the drawings, is of such thickness that it may be seated with its end positioned between the adjacent ends of the cams 20 and 21.

Reciprocally mounted in the cylinder 4 and bet-ween the plunger plate and the closed end 5 of the cylinder is a piston 26,

rovided with customary packing rings 27 orming an air tight engagement with the walls of thecylinder. This piston is-maintained in en a ement with the plunger plate by means 0 t e helical spring 28 one end of which bears against the piston while its other end bears against the closed end- 5 of ing toward each other in such a manner as to allow the plunger plate to move down the inclined faces of: the cams,thereby allowing the piston to move away from the closed end 5 of the cylinder thus letting in air through the valve 6. -As will be seen the device in no wayaffects the action of the I springs while the same are being compressed. As the springs expand the arms are rotated in the opposite direction by which means through the medium of the cams, the plunger plate is forced against the piston, forcing ittoward the closed end '5 of the cylinder, the air slowly escaping meanwhile through the ports 8. By this means an air cushion is formed in the closed end of the cylinder, which tends to retard the expansion of the springs and also to prea vehicle frame and a spring therefor, provided at one end with an air inlet valve and escape ports, a closure for the other end of said cylinder, said closure having an extending arm the free end of which terminates in a lateral extension j ournaled in the frame, a spring held piston slidable in said cylinder, a plunger plate mounted against rotation in said cylinder and slidable therein, one end of said plunger bearing against the piston, a disk shaped cam member rotatably mounted in said cylinder and having Wedge cams adapted to engage with the free end of said plunger plate and actuate the same when the cam member is rotated, and means connecting said cam member with the spring of the frame, said means being adapted to rotate the cam member when said framespring is distorted.

In testimony whereof, I aflix my signature, in presence of two witnesses.

WILLIAM A. SCHILLER.

Witnesses:

Josnrrr A. SCHILLER, L. N. BARR. 

